Magazine fuse



2 Sheets-Sheet l &\\\\\\\\\\\\\\\ MAGAZ INE FUSE l.. s. Foo

Filed'Augs, 1927 mi l Aug. 26, 1930.

(4NI z l 1 lNvENToR ATTORNEY L S. Foo

MAGAZINE FUSE Filed Aug, 5' 1927 nl? a a INVFENTOR Z Sz.

ATTORN EY s. s E N w W Patented Aug. 26, 1930 PATENT oFFicE LEE SINGF00, 0F MANCHESTER, NEW HAMPSHIRE MAGAZINE FUSE This invention relatesto a magazine fuse, the object being` to provide a device which willfeed a plurality of cartridge fuses in position to maintain adistribution circuit indefinitely. Devices of this kind have heretoforebeen provided but are commonly made of flexible fuse wires fed from areel and which on blowing of the fuse can be unreeled a suficientdistance to restore the integrity of the distribution circuit. Myinvention, however, differs from devices of this kind in providing amagazine fuse holder attachable toa fixture mounted on the wall of thehouse or station and which, on blowing the fuse, will auto'- matically`permit ejection of the blown fuse and its replacement' by another fromthe magazine, this operation being continuous for a plurality ofoverloads of the consumption cir.- cuit and may then be rendered offurther use by a new supply of cartridge fuses. The fuse casing isformed of an insulating holder in which a plurality of fusesmay: beconsecu-v tively lowered into engagement with a circuit terminal bywhich any fuselowered by a compression spring may be brought intocircuitclosing .position automatically when the blown fuse is ejected.The magazine, the walls of which are of suitable insulating material, asindurated fiber, carries imbedded wires by .which the circuit isautomatically completed, when a fresh fuse is pushed'by the spring intoengagement with the circuit closing terminal. i

The invention therefore, in' its broader phase, involves a magazine fusecontaining a plurality of cartridge fuses having a compression springdriving them toward the open end, and circuit closing detents at theopen end by which they blown fuse may be discharged automatically and afresh fuse in stalled in its place. It comprises other features, thenovelty of which will be more fully hereinafter described and will bedefinitely indicated in the appended claims.

In the drawings-illustrating the invention: f Figure 1 is a verticalsectional view taken through the device forming the subject matter ofthe present invention, and illustrating parts in elevation.

`Figure 2 1s a partial vertical sectional view Application filed August5, 1927'. serial No. 210,926.

taken through the fuse magazine or holder, with parts in elevation andin ydotted lines.

Figure 3 is a horizontal sectional view taken through the fuse magazineor holder.

Figure 4 is a sectional view taken through the fuse magazine or holderadj acentthe top thereof with the cover for said holder re'- moved andshowing a fuse and other parts in elevation. l,

Figure 5 is a horizontal sectional view taken through the support stripand showing thev upper socket or bracket terminal in section.

Figure 6 is a detail view of the upper hook.

Figurek 7 is a perspective view of an angle bracket which forms a art ofthe invention, for securing thel cover o the fuse' magazine or holder inclosed position. f Y

Figure 8 is a similar viewk of the upper bracket terminal.

Figure 9 is a similar view of onecontact member for the fuses.

Figure 10 is a similar View of the other contact member. Y

Referring to they drawings in detail, the reference numeral l indicatesa supporting strip of fiber slate o r other suitable insulating materialadapted to be secured in any wel-l known manner to the wall of abuilding or the like, and secured to the strip by set screws is abracket terminal 2 which includes a folded clip 3 for the purpose ofaccommodating one end of a conductor 4, and the bracket terminal alsoincludes a substantially rectangular shape socket member including sidewalls 5 and 5a and a front wall slotted' longitudinally to providespaced' portions 6 and 6 as clearly shown in 4`igure 8 of the drawings.The socket is adapted to receive the finger of a U-shape support or hook7 which is secured to one of the end walls of a fuse magazine or holder8 in a manner as clearly shown in Figure l. 'The hook 7 is secured tothe end Wall by set screws, anda bracket terminal 2L similar to thebracket terminal 2 is mounted ad'- jacent the bottom of the wall tocooperate with a hook 7a similar to the hook 7, the hooksf' andi'a beingreceived in the rectangularportions of thebracket terminals.

The fuse maga-zine or holder is rectangular in shape as best shown inFigure 3, and is formed from insulating material. One side wall of theholder is provided with a vertiially arranged groove or recess ot archcross sectional shape and this recess is indicated by the referencenumeral 9. Formed in the opposite side wall is a vertically arranged 10.rectangular in cross section, the recess 9 forming a vertical guide torthe rounded boss on one oi the ends ot the cartridge fuses as shown, andthe groove 10 forms a guide tor the posts 1.2 oi the fuses.

The fuse holder is provided with a cover 13 which when in closedposition applies pressure to the fuses 1% through the medium of a springmeans which will be presently described, and the cover has dependingthererom adjacent the ends thereof flan; 15 and Cdecrire-tl to theunderside ot the cover through the medium ot rivets or the lilie is oneend portion of a looi` ed spring 1G which has secured to its opposite orlower end, a plate 17 having` tlangos curved to follow the curvature oithe fuse 1i as best shown in liigure 2 of the drawings.

Secured to the end wall which carries the hooks 7 and in is a springcontact member 18 that is arranged adjacent the bottom ot the lastmentioned end wall and includes a spring linger disposed in the path ofthe post 12 of the fuses as clearly shown in Figure 1.

ln order to retain the cover in closed position, the ilano'e 15 isprovided with an opening that reg sters with a similar opening in theother wall of the fuse holder, and these registering openings receive apin 19. Cooperating with the pin 19 is an angle plate 18 that includes ashort arm 19 adapted to be received in a. slot formed in the flange 15.

The structure of the fuses is clearly shown in Figure 1, and each of thetu not only include a post 152, but likewise include a fusible neel; 2Oof a crossv section according to the required amperage. Formed with eachot the ends of the neel-z are conical shape por tions 21 and Q1, theportion 2l has .termed tl erewith a guide Q?, trom wh` 'h entends thepost 1i?, and the guide is ol a s. vto snugly lit within the casing of"the fuse hutl is mounted tor slidable movement therein. D "posed aboutthe portion Q3 ot the post l2 is a coil spring 2l that has one ot itsoud con.olution:-:

ne while its opposite end a plu@ lo which -i'loscs f and extending oneot the em s ot rvhe trom diametricallv opposite sides ot the plug ...tlas well as a gif-ortion ot' the 'fuse having iownecl therewith theportion Q1 and the boss 11 are pins which are received in the casing asshown. By this construction, it will be obvious that when the neckhecomes broken, the coil spring '224i will urge the post 12 out otengagement with respect to the linger of' the spring contact 1S. rlhecasings of e is may be formed from .fiber or similar ng material. Thespring contact 1S is secured to the 'fuso holder by set screws whichlikewise secure the hooks l thereto as clearly shown in Figure 1.

It will be apparent therefore that when the cover is removed thecartridges may ho dropped into the casing and when the cover is appliedthe pressure of the spring 1G will force the bottom ruse into engagementwith the spring le and the copper or brass terminal 2T wl h is securedto the front wall ol the magazine by one or more set screws 2S. In thewalls o'l`r the magazine are mounted a metallic strip which may be donein process ot formation or mounted on the outside thereof but in any:vent terminates in metallic continuity with the brass or copperterminal Q7. The metallic strip 29 is in metallic continuity orengagement with a transverse metallic stri p 29 which terminates incontactwith the upper hool; 7, whereby there is me tallic contiiiuityhetween the terminal Q, the hook T, the wires QS). 29 to the bottomterminal 27. Consequently, when the cartriiilgcsI are stacked in thetuse ma y izine and the cover applied, the bottom cartridge isautomatically forced into engagement with the terniinals 1S and 27 sothat the lfuse is placed in circuit with one conductor l and thecorresponding opposite conductor 4i" of the circuit. On overloading otthe circuit the narrow neel( Q0 ot the fuse gives away by melting andthe spring 24 causes the terminal to leave the spring 1S andautomatically drop away lrom the magazine, whereupon the pres,` ire ofthe spring 1G drives a new cartridge fuse into its seat between thespring 1S and the terminal 2T, thereby renewing the integrity ot thecircuit. Sin'iilarly this operation will continue as long as sparecartridge fuses are supplied to the magazine.

lllhile I have shown a certain specific 'form ot construction. it isobvious that modifications of the holder and its support may he madewithout departing V'rom its scope and is only limited hy the terms oltthe appended. claims.

Having thus described my invention, what I claim as new and desire tosecure by lietters Patent is:

l. ln a luse magazine holder. a strip of iusulating material, bracketterminals includin' clips 'tor receiving condurtors and being secured tothv strip. :in open bottom holder, cartrie e 'l'nscs adapted to hcreceived in said holder. hoot; secured to said holder and detachablyreceived h v said bracket terminals, a cover for said holder, means 'forsecuring said cover in operative position, a spring having one endsecured to said cover, an arched hot`- tom piece secured to the oppositeend ot said spring and engageable with an adjacent cartridge fuse,spring contact having connection with one hook and secured in said casinin the path of posts ot the cartridge fuses, a terminal secured in theholder in opposed direction With respect to the spring contact andarranged in the path of the cartridge fuses, and metallic meanscompleting a circuit between the other hook and the said ter- 5 minal.

2. A magazine fuse device comprising a strip ol insulating material,means secured to said strip and receiving conductors, a cartl ridge fuseholder, means secured to said holder and received by the first mentionedmeans whereby the holder s supported with respect to the strip,cartridge fuses adapted to be received in said holder said holder havinreccssed sides for guiding the cartridge uses l for movement therein, acover for said holder, a coil spring secured to said cover, an archedbottom piece secured to said coil spring for engagement with an adjacentcartridge fuse for urging said cartridge fuses through said holder, aspring contact secured in said holder in the path of cartridge fuseposts, said spring contact being electrically connected with oneconductor through the medium of a portion of the holder supportingmeans', a

terminal arranged in opposed relation With respect to the springcontact, for engagement with the cartridge fuses, metallic means embedded in said holder for electrically connecting the terminal with theother conductor through the medium of the remaining portion of theholder supporting means, said holder having an open bottom, andresilient means included in said cartridge fuses for the purposespecified.

3. A magazine fuse device comprising a strip of insulating material,conductor receiving means secured to said strip a cartridge fuse holder,means secured to said cartridge fuse holder and supported by theconductor rcccivin g means for securing said holder With respect to saidstrip, cartridge fuses including casings and adapted to be mounted insaid holder, enlarged terminals included in each cartridge fuse, ametallic post for each cartridge fuse, a plug having a post passingtherethrough, a coil spring surrounding the post and engaging the plugand one of said terminals, contact means arranged in said holder andbeing bridged by one of the cartridges fuses, one of said contact meansbeing in electrical connection )Vith one conductor, metallic meanselectrically connecting the other contact mea-ns with the otherconductor, and. a coil spring for urging the 53 fuses in contact withsaid contact means.

`1n testimony whereof I aiX my signature.

LEE SING FOO.

